積層基材、繊維強化プラスチック、およびそれらの製造方法

Laminated substrate, fiber-reinforced plastic, and methods for producing them

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intermediate substrate which is excellent in a handling property and in a shape-following property to complicated shapes, can be molded in a short time, and expresses excellent dynamic physical properties including impact resistance applicable to structural materials, their low irregularity, and excellent dimensional stability, when processed into fiber-reinforced plastics. <P>SOLUTION: Provided is an intermediate substrate which is a flat plate-like laminated substrate 10 produced by arranging prepreg layers 7, comprising a plurality of unidirectionally oriented reinforcing fibers and a thermoplastic resin, in two or more directions and then integrating the prepreg layers, characterized in that the whole surfaces of the prepreg layers have linear notches 4 at an angle Θ in an absolute value range of 2 to 25 degrees to the reinforcing fibers; substantially all the reinforcing fibers are divided with the notches; and the length L of the reinforcing fibers divided with the notches is in a range of 10 to 100 mm. <P>COPYRIGHT: (C)2010,JPO&INPIT
【課題】取り扱い性、複雑な形状への形状追従性に優れ、短時間成形可能であるとともに、繊維強化プラスチックとした場合、構造材に適用可能な耐衝撃性をはじめとする優れた力学物性、その低バラツキ性、優れた寸法安定性を発現する中間基材を提供する。 【解決手段】中間基材は、複数の一方向に配向した強化繊維と熱可塑性樹脂とからなるプリプレグ層7が、2方向以上に配向して一体化されている平板状の積層基材10であって、前記プリプレグ層の全面に強化繊維となす角度Θの絶対値が2〜25°の範囲内の直線状の切込4を有し、実質的にすべての強化繊維が前記切込により分断され、前記切込により分断された強化繊維の繊維長さLが10〜100mmの範囲内である。 【選択図】図8

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